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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.java.sip.communicator.service.protocol.media;
import org.jitsi.service.neomedia.*;
/**
* A wrapper of media quality control.
*
* @param <T> <tt>MediaAwareCallPeer</tt>
* @author Damian Minkov
* @author Sebastien Vincent
*/
public abstract class AbstractQualityControlWrapper<
T extends MediaAwareCallPeer<?, ?, ?>>
implements QualityControl
{
/**
* The peer we are controlling.
*/
protected final T peer;
/**
* The media quality control.
*/
private QualityControl qualityControl;
/**
* The currently used video quality preset.
*/
protected QualityPreset remoteSendMaxPreset = null;
/**
* The frame rate.
*/
private float maxFrameRate = -1;
/**
* Creates quality control for peer.
* @param peer
*/
protected AbstractQualityControlWrapper(T peer)
{
this.peer = peer;
}
/**
* Checks and obtains quality control from media stream.
* @return
*/
protected QualityControl getMediaQualityControl()
{
if(qualityControl != null)
return qualityControl;
MediaStream stream = peer.getMediaHandler().getStream(MediaType.VIDEO);
if(stream instanceof VideoMediaStream)
qualityControl = ((VideoMediaStream)stream).getQualityControl();
return qualityControl;
}
/**
* The currently used quality preset announced as receive by remote party.
* @return the current quality preset.
*/
public QualityPreset getRemoteReceivePreset()
{
QualityControl qc = getMediaQualityControl();
return (qc == null) ? null : qc.getRemoteReceivePreset();
}
/**
* The minimum preset that the remote party is sending and we are receiving.
* Not Used.
* @return the minimum remote preset.
*/
public QualityPreset getRemoteSendMinPreset()
{
QualityControl qc = getMediaQualityControl();
return (qc == null) ? null : qc.getRemoteSendMinPreset();
}
/**
* The maximum preset that the remote party is sending and we are receiving.
* @return the maximum preset announced from remote party as send.
*/
public QualityPreset getRemoteSendMaxPreset()
{
QualityControl qControls = getMediaQualityControl();
if(qControls == null)
return remoteSendMaxPreset;
QualityPreset qp = qControls.getRemoteSendMaxPreset();
// there is info about max frame rate
if(qp != null && maxFrameRate > 0)
qp = new QualityPreset(qp.getResolution(), (int)maxFrameRate);
return qp;
}
/**
* Changes local value of frame rate, the one we have received from
* remote party.
* @param f new frame rate.
*/
public void setMaxFrameRate(float f)
{
this.maxFrameRate = f;
}
/**
* Changes remote send preset. This doesn't have impact of current stream.
* But will have on next media changes.
* With this we can try to change the resolution that the remote part
* is sending.
* @param preset the new preset value.
*/
public void setRemoteSendMaxPreset(QualityPreset preset)
{
QualityControl qControls = getMediaQualityControl();
if(qControls != null)
qControls.setRemoteSendMaxPreset(preset);
else
remoteSendMaxPreset = preset;
}
/**
* Changes the current video settings for the peer with the desired
* quality settings and inform the peer to stream the video
* with those settings.
*
* @param preset the desired video settings
* @throws MediaException
*/
public abstract void setPreferredRemoteSendMaxPreset(QualityPreset preset)
throws MediaException;
}
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